Powers & Abilities of Gwendolyn "Gwen" Tennyson

Energy Manipulation

 Given her Anodinian liniage, Gwen is capable of energy manipulation. She also has a wide range of other loosely defined magical abilities, such as dowsing, telepathy and clairvoyance. 

 Gwen using magic

Her powers are revealed to be alien in origin; her grandmother, Verdona, is an energy being known as an Anodite. Verdona tells Gwen that what she and others originally thought of as "magic" was actually the manipulation of a Force-like energy called mana. Verdona offers to take Gwen to her home planet and train her in the mystical ways of the Anodites, but Gwen prefers to remain on Earth with Ben and Kevin. 

She hates being called an "Energy being", referring to her Anodite heritage. In 'War of The Worlds', Gwen releases her Anodite form, and was almost overwhelmed by her own power before Kevin snaps her out of it. 

"Magic"

Overall, her most notable skill is her innate, if latent, ability at magic (see Gwen's Spells). Having within her what Charmcaster calls a "magical aura", Gwen is capable of using various magical artifacts and spells. When using the magical, luck-giving Charm of Bezel, she was able to activate it instinctively, whereas Hex did or could not. Later on, when she takes and uses his staff, she was able to make it fire an energy blast—according to Charmcaster, only someone of Hex's skill should have that power. Gwen starts tapping into her magical powers when she procures a book of spells from Charmcaster in the episode "A Change of Face". 

 Gwen as "Lucky Girl".

 

The "Luck" Charm of Bezel

 

  Gwen destroying the Charms of Bezel

On two occasions, Gwen has the Charms of Bezel to become a superheroine by the name of Lucky Girl. At first, her ability drew from the "luck" Charm of Bezel, which innately gave her perfect luck. While wearing the charm, any action she took would result in an Rube Goldberg-style chain reaction benefiting her original intent, but usually injuring Ben in the process. She later brought back her superhero identity after obtaining the Keystone of Bezel, which increased her natural abilities to superhuman levels rather than just affecting her luck. Both times, Gwen was forced to retire when the Charms of Bezel were destroyed.

 Athletics

Gwen is a capable gymnast and has had some training in martial arts. At the age of fifteen it is revealed that she has already received a black belt in karate and has even started teaching Ben.

Possible Future

Possible future is Gwen could mary Kevin

Behind the Scenes

• In the original series, Gwen is voiced by Meagan Smith.
• In Ben 10: Alien Force, Gwen is voiced by Ashley Johnson.
• In the episodes "Ben 10,000" and "Ken 10", Gwen is voiced by Tara Strong. Incidentally, Strong also voices the 10-year-old Ben.
• In the live-action movie, Ben 10: Race Against Time, Gwen was played by Haley Ramm.
• Gwen's magical abilities and even her name might have been inspired by the Sibyls from Chris 'D Lacey's series of books,The Last Dragon Chronicles. In the series, Sibyls are able to command the supernatural, and they are the descendants of a powerful magics user, Gwendolen.
• Gwen`s lucky girl suit looks simlar to Hellcat from Marvel.
• The Cat logo on Gwen in the first series looks very similar to Sly Cooper's logo.